Recordio 591 - Bottom View

F IG.3
BOTTOM V
IEW
OF MEC
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ITH D
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PLATE
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3.
Using a
pencil-type
postal
scale, check
the
pressure
needed
to
just
pull
the
right
pad
away
from
the
play-record
head.
The test should
be
made
at the end
of the
pressure
pad
mounting
spring.
If necessary,
adjust
locked
adjustment
screw
(50)
until
a
reading
ot L
l/
4
ounce
+
L/
4
ounce
is
obtained.
4.
Adjust
guide post
pressure
pad (Ieft pad)
by
bending
pressure
pad
spring
(49).
It must
be
adjusted
for
minimum
pressure
againstthe tape.
NOTE:
After making the
adjustment, depress
the Stop
button, and
replace
the
front
escutcheon.
Erase
Head
1. With
tape
properly
threaded,
turn
recorder
on
and depress
the
Record
button.
Allow
tape
to
run
for
a
few
secondsl
then turn recorder
off,
but
leave
Record
button
depressed"
2. With
timer escutcheon
(7)
and front escutcheon
(14)
removed,
check
erase head
(28)
to see that
it is
parallel
with the
tape.
3.
Make
surethe
topedge
of the
tape coincideswith
the top
end of the diagonal
slot in
the
erasure
head(junction
of
long
diagonal
andshort
vertical
slot). To
adjust
the level
of
the tape,
loosen
set
screw
(24),
and
rotate
tape
gurde
post
(2b)
to
move
the tape
up
or down.
Brake
Shoe
I.
With
all
push
buttons in
the up
position,
brake
pads
(81)
should
clear
brake
drums
(123)
and
(133)
by
approximately l,/ 8
inch.
2.
Depress
the
Stop
button
while observing
the
brake
pads.
Both
brake
pads
must
contact
the
brake drums
at the same
time
and
with equal
pressure.
3.
If necessary,
adjust the
pressure
by bending
brake spring
(80).
Head
Alignment
Use
standard
6- or
12-
alignment
tape for
this
procedure.
Remove
front
and
rear
escutcheons.
Clean
pole
pieces
of
play-record
head,
using
a
good
commercial
head cleaning
agent, naptha
or
lighter
fluid.
Proceed
as
follows:
t.
Thread
alignrnent tape on recorder
and
turn the
volume
on
fuII"
Connect
VTVM to external
speaker
jack.
$et meter for
AC volts,
3-volt
range.
o
(t
rn
7
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